Evaporator



Dec. 23, 1941. R. H. MONEY EVAPORATOR Filed Feb. 24, 1938 2 Sheets-Sheet l INVENTOR. 1? 0L AND 17. Iva/vex ATTORNEYS.

'K HMIHU HHHHH llllllllllllllll .llllllllll lllllllllllllllllalllllll llllllllllllllllIllllllllIv/llll lllllllllllllllllll lllllll ll lllll l\ Dec. 23, 1941. R. H. MONEY EVAPORATOR Filed Feb. 24, 1938 2 Sheets-Sheet 2 mh UM- NIAH I H N IN VENT OR. ROLAND H Ma/vsn BY ATTORNEYS.

Patented Dec. 23, 1941 EVAPORATOR Roland H. Money, Cincinnati, Ohio, assignor to The Crosley corporation oi. Ohio Corporation,

Cincinnati, Ohio, a

Application February 24, 1938, Serial No. 192,248

2 Claims.

My invention relates to evaporators for refrigerators particularly of the compact domestic type, and has for its object the production of a corrugated metal type of evaporator with long roller welded joints throughout, and so arranged as to provide a wave line passage for refrigerant which is divided and distributed to a pair of spaced headers.

My evaporator is made of two sheets of metal, with the corrugations or indentations preferably located in but one of them, except at the reverse curves at the end of the wave line corrugations of the other plate and at the header portions. I provide matching indentations in the otherwise uncorrugated plate, so as to make the return bends of greater diameter than the remainder of the passageways. This feature is quite desirable as it prevents congestion at the said return bends. Each of the plates have indentations which later make up the two headers.

I have illustrated a preferred form of my invention and will describe the same in full, the novelty therein being set forth in the claims that follow to which reference is hereby made.

In the drawings:

Figure 1 is an edge elevation of the plates united prior to bending up the evaporator into U-shaped form.

Fig. 2 is a plan view of the same, taken from the side of the chiefly corrugated plate.

Fig. 3 is a side elevation of the completed evaporator.

Fig. 4 is a section on the line 4-4 of Fig. 3.

Fig. 5 is a section on the line 5-5 of Fig. 4.

Referring first to the parts when in the flat, I provide two metal plates i and 2 and at the ends of each plate I provide indentations 3 and 4 respectively, which indentations match each other and when the plates are put together form the header chambers 5 and 6 of the evaporator.

The plate i is corrugated in a wave line with indentations which extend continuous from a point 1, near the end of one header, thence across in a straight line to a point near the opposite header, as at 8, thence in a return bend 9, back to a point near the first header where there is another return bend etc. except at the opposite ends of the two headers. Here a wider indentation II is made which communicates with the half header portions 3 and 4 of the sheet I. Also in order to balance the appearance of the structure I provide a single short indentation l2 next the indentation I i, which indentation I2 is independent of the other indentations. Finally the indentation l3 which is opposed to the indentation I2 is so made that it. communicates at II with the wider indentation H.

The other plate 2 of the structure'is formed with indentations [5 which areconflned to return bend portions only, which return bend portions will take a matching position with the return bends in the indentations of the plate i.

With the plates bent up, the outer margin of the plate 2 as indicated at i6, may be mitred at the corners and bent over the plate I, so as to give a pleasing trim to the device. The welds are made by the roller welding process, for use with which the structure is designed, and which will result in a very strong and highly reinforced structure. The first weld as indicated at I! will extend entirely around the margin of the two plates outside of the header and indentations, but inside of the folded over margin of the one plate. A roller weld i8 is then made at both sides of the structure just inside of each header. Welds are made between each of the ribs resulting from the indentations or corrugations which preferably join the welds l8. These welds are made as indicated at l9, alternately from the open spaces between return bends, as shown on the drawings. They may extend from the welds l8 and clear across the structure terminating for each weld just inside of the return bend which shuts off the path of the weld.

Thus there are, as illustrated, eleven straight rib portions with return bends at alternate ends, and ten roller welds extending inwardly between the ribs.

This results in a very strong structure which is simple to make. Were it not for the wave line arrangement it would not be so practical to use the roller or continuous weld practice.

The presence of the extra diameter to the passageway resulting in the indentations, at the return bends, taken with the more confined spaces in the main branches of the passageway provides a refrigerant flow which is excellently adapted to 'eflicient results. The dividing of the refrigerant into two paths in the final branch of the passageway, and the use of two headers also provides just the type of flow desired.

As shown, the plate 2 has one indentation at 20 which is located where the wave line passageway begins, thus providing a little more space at the inlet. The refrigerant enters the evaporator at 2|, where this extra space is provided.

When the structure is all welded up it is then bent to. U-shape with the two headers at the top of the two legs, and suitable connections are made to the two headers.

It is apparent that certain of, my advantages would be present if both plates were provided with matching passageways forming indentations throughout, and that certain advantages would be present in the structure as shown, in the absence of continuous or roller welds.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. An evaporator comprising a pair of opposed plates welded together at the edges thereof, a pair of matched indentations in said plates at the ends thereof forming headers therein, one plate having an indentation therein forming a passageway communicating with said headers and extending back and forth across the surface thereof and having reverse bends adjacent the headers and welds uniting said plates and extending parallel to said indentation, said welds beginning at alternate ends of said plate adiacent said headers and terminating adjacent the opposite ends within said reverse bends.

2,. An evaporator comprising a pair of plates welded together at the edges thereof. a pair of matched indentations in said plates at the ends thereof forming headers therein, one plate having an indentation therein forming a passageway communicating with said headers and extending back and iorth across the surface thereof and having reverse bends adjacent the headers and welds uniting said plates and extending parallel to said indentation, said welds beginning at alternate ends of said plate adjacent said headers and terminating adjacent the opposite ends within said reverse bends, that portion of said passageway which communicates with said headers being of greater diameter than those portions thereof which extend back and forth across the surface of the plate.

ROLAND H. MONEY. 

